CA1278371C - Automatic gain control of a scrambled video signal - Google Patents
Automatic gain control of a scrambled video signalInfo
- Publication number
- CA1278371C CA1278371C CA000524112A CA524112A CA1278371C CA 1278371 C CA1278371 C CA 1278371C CA 000524112 A CA000524112 A CA 000524112A CA 524112 A CA524112 A CA 524112A CA 1278371 C CA1278371 C CA 1278371C
- Authority
- CA
- Canada
- Prior art keywords
- signal
- gain control
- sync
- video signal
- video
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000012545 processing Methods 0.000 claims abstract description 9
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 description 21
- 239000003550 marker Substances 0.000 description 14
- 230000008859 change Effects 0.000 description 12
- 238000010897 surface acoustic wave method Methods 0.000 description 10
- 230000004044 response Effects 0.000 description 9
- 230000014509 gene expression Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 230000005236 sound signal Effects 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 238000013475 authorization Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- HTIQEAQVCYTUBX-UHFFFAOYSA-N amlodipine Chemical compound CCOC(=O)C1=C(COCCN)NC(C)=C(C(=O)OC)C1C1=CC=CC=C1Cl HTIQEAQVCYTUBX-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- SYHGEUNFJIGTRX-UHFFFAOYSA-N methylenedioxypyrovalerone Chemical compound C=1C=C2OCOC2=CC=1C(=O)C(CCC)N1CCCC1 SYHGEUNFJIGTRX-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/52—Automatic gain control
- H04N5/53—Keyed automatic gain control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
- H04N7/171—Systems operating in the amplitude domain of the television signal
- H04N7/1713—Systems operating in the amplitude domain of the television signal by modifying synchronisation signals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
- Control Of Amplification And Gain Control (AREA)
- Circuits Of Receivers In General (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/813,135 US4706285A (en) | 1985-12-24 | 1985-12-24 | Automatic gain control of a scrambled video signal |
| US813,135 | 1991-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1278371C true CA1278371C (en) | 1990-12-27 |
Family
ID=25211541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000524112A Expired - Lifetime CA1278371C (en) | 1985-12-24 | 1986-11-28 | Automatic gain control of a scrambled video signal |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4706285A (enrdf_load_stackoverflow) |
| JP (1) | JP2556318B2 (enrdf_load_stackoverflow) |
| KR (1) | KR950002667B1 (enrdf_load_stackoverflow) |
| CA (1) | CA1278371C (enrdf_load_stackoverflow) |
| DE (1) | DE3644290A1 (enrdf_load_stackoverflow) |
| FR (1) | FR2592262B1 (enrdf_load_stackoverflow) |
| GB (1) | GB2184904B (enrdf_load_stackoverflow) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4670904A (en) * | 1986-01-15 | 1987-06-02 | Rca Corporation | System for processing a scrambled video signal |
| JPS62264778A (ja) * | 1986-05-12 | 1987-11-17 | Toshiba Corp | Ａｇｃ回路 |
| JPS6448584A (en) * | 1987-08-18 | 1989-02-23 | Alps Electric Co Ltd | Catv converter |
| JPH01137391U (enrdf_load_stackoverflow) * | 1988-03-09 | 1989-09-20 | ||
| US5133009A (en) * | 1990-10-04 | 1992-07-21 | Thomson Consumer Electronics, Inc. | Method and apparatus for defeating the operation of an ic built-in noise inverter |
| US5331290A (en) | 1992-09-08 | 1994-07-19 | Samsung Electronics Co., Ltd. | Variable gain amplifier |
| US5862219A (en) * | 1995-05-12 | 1999-01-19 | General Instrument Corporation | Cable television setback decoder automatic control |
| EP0830786A1 (en) * | 1995-06-08 | 1998-03-25 | ICTV,Inc. | Switched channel system |
| US5644637A (en) * | 1995-09-27 | 1997-07-01 | General Instrument Corporation Of Delaware | Method and apparatus for recovering synchronizing signals in scrambled television pictures |
| US6292567B1 (en) * | 1997-08-26 | 2001-09-18 | Eagle Comtronics, Inc. | Sync suppression television security system with addressable sync restoration |
| DE102004061389A1 (de) | 2004-12-21 | 2006-06-22 | Mitsubishi Polyester Film Gmbh | Biaxial orientierte Polyesterfolie, die Siliziumdioxid und Titandioxid enthält |
| US8074248B2 (en) | 2005-07-26 | 2011-12-06 | Activevideo Networks, Inc. | System and method for providing video content associated with a source image to a television in a communication network |
| EP2632165B1 (en) | 2007-01-12 | 2015-09-30 | ActiveVideo Networks, Inc. | Interactive encoded content system including object models for viewing on a remote device |
| US9826197B2 (en) | 2007-01-12 | 2017-11-21 | Activevideo Networks, Inc. | Providing television broadcasts over a managed network and interactive content over an unmanaged network to a client device |
| KR20130138263A (ko) | 2010-10-14 | 2013-12-18 | 액티브비디오 네트웍스, 인코포레이티드 | 케이블 텔레비전 시스템을 이용하는 비디오 장치들 간의 디지털 비디오의 스트리밍 |
| EP2695388B1 (en) | 2011-04-07 | 2017-06-07 | ActiveVideo Networks, Inc. | Reduction of latency in video distribution networks using adaptive bit rates |
| WO2013106390A1 (en) | 2012-01-09 | 2013-07-18 | Activevideo Networks, Inc. | Rendering of an interactive lean-backward user interface on a television |
| US9800945B2 (en) | 2012-04-03 | 2017-10-24 | Activevideo Networks, Inc. | Class-based intelligent multiplexing over unmanaged networks |
| US9123084B2 (en) | 2012-04-12 | 2015-09-01 | Activevideo Networks, Inc. | Graphical application integration with MPEG objects |
| US10275128B2 (en) | 2013-03-15 | 2019-04-30 | Activevideo Networks, Inc. | Multiple-mode system and method for providing user selectable video content |
| US9219922B2 (en) | 2013-06-06 | 2015-12-22 | Activevideo Networks, Inc. | System and method for exploiting scene graph information in construction of an encoded video sequence |
| US9294785B2 (en) | 2013-06-06 | 2016-03-22 | Activevideo Networks, Inc. | System and method for exploiting scene graph information in construction of an encoded video sequence |
| US9326047B2 (en) | 2013-06-06 | 2016-04-26 | Activevideo Networks, Inc. | Overlay rendering of user interface onto source video |
| US9788029B2 (en) | 2014-04-25 | 2017-10-10 | Activevideo Networks, Inc. | Intelligent multiplexing using class-based, multi-dimensioned decision logic for managed networks |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4408225A (en) * | 1981-07-06 | 1983-10-04 | Zenith Radio Corporation | Subscription television decoder |
| US4509210A (en) * | 1981-11-30 | 1985-04-02 | Rca Corporation | Television receiver adaptable for descrambler module |
| US4554581A (en) * | 1982-12-20 | 1985-11-19 | Zenith Radio Corporation | STV Decoder with improved data signal recognition capability |
| US4523228A (en) * | 1983-02-15 | 1985-06-11 | Scientific Atlanta Inc. | Sync suppression scrambling of television signals for subscription TV |
| DE3343307A1 (de) * | 1983-11-30 | 1985-06-05 | Blaupunkt-Werke Gmbh, 3200 Hildesheim | Verfahren zum verschluesseln und entschluesseln von analogen signalen, sowie schaltungsanordnung zur durchfuehrung des verfahrens |
| JPS60239188A (ja) * | 1984-05-12 | 1985-11-28 | Sony Corp | テレビジヨン信号復調装置 |
-
1985
- 1985-12-24 US US06/813,135 patent/US4706285A/en not_active Expired - Lifetime
-
1986
- 1986-11-28 CA CA000524112A patent/CA1278371C/en not_active Expired - Lifetime
- 1986-12-23 DE DE19863644290 patent/DE3644290A1/de active Granted
- 1986-12-23 GB GB8630677A patent/GB2184904B/en not_active Expired - Lifetime
- 1986-12-23 KR KR1019860011125A patent/KR950002667B1/ko not_active Expired - Fee Related
- 1986-12-23 FR FR8618094A patent/FR2592262B1/fr not_active Expired - Fee Related
- 1986-12-24 JP JP61315954A patent/JP2556318B2/ja not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| GB2184904B (en) | 1990-01-31 |
| GB2184904A (en) | 1987-07-01 |
| KR950002667B1 (ko) | 1995-03-24 |
| JP2556318B2 (ja) | 1996-11-20 |
| DE3644290C2 (enrdf_load_stackoverflow) | 1989-09-07 |
| JPS62165494A (ja) | 1987-07-22 |
| US4706285A (en) | 1987-11-10 |
| DE3644290A1 (de) | 1987-06-25 |
| FR2592262A1 (fr) | 1987-06-26 |
| KR870006801A (ko) | 1987-07-14 |
| FR2592262B1 (fr) | 1993-12-03 |
| GB8630677D0 (en) | 1987-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1278371C (en) | Automatic gain control of a scrambled video signal | |
| US4718086A (en) | AGC in sound channel of system for processing a scrambled video signal | |
| US4670904A (en) | System for processing a scrambled video signal | |
| EP0479224B1 (en) | Apparatus for defeating the operation of an IC built-in noise inverter | |
| US4514763A (en) | Sound signal and impulse noise detector for television receivers | |
| US4974087A (en) | Parallel sound if with reference carrier derived from quasi-synchronous video detector | |
| US4470071A (en) | Television sound detection system using a frequency translation phase-locked loop | |
| US5113439A (en) | Catv terminal and video apparatus having a noise eliminating circuit | |
| US4511924A (en) | Frequency translation phase-locked loop for separate or intercarrier type television sound detection | |
| US5553142A (en) | Audio recovery from scrambled video in a cable compatible television receiver | |
| US4470070A (en) | Frequency translation phase-locked loop television sound detection system | |
| US5029340A (en) | CATV terminal unit having an improved descrambling operation | |
| US4649420A (en) | Automatic frequency response correction using color burst | |
| JPS60239188A (ja) | テレビジヨン信号復調装置 | |
| KR920002840B1 (ko) | 텔레비젼 음성 검출장치 | |
| US3139484A (en) | Compatible color-television apparatus | |
| JPS623974Y2 (enrdf_load_stackoverflow) | ||
| KR970004922Y1 (ko) | 세캄 컬러신호의 게이트 펄스 자동 조절회로 | |
| JPH0412070B2 (enrdf_load_stackoverflow) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed | ||
| MKLA | Lapsed |
Effective date: 20031229 |